Air-controlling valve for rock-drilling engines.



J. G. LEYNER.

AIR GONTROLLING'VALVE FOR ROGK DRILLING ENGINES.

APPLIUATION FILED AUG.15, 1911.

Patented 0013.1, 1912.

UNITED ST ES? PATENT OFFICE.

JOHN GEORGE LEYNER, 01? DENVER, CdLORADO.

AIR-CONTROLLING VALVE FOR ROCK-DRILLING ENGINES.

Specification of Letters Patent.

Patented oer. 1, 1912.

Application filed August 15, 1911. Serial No. 644,154.

To all whom it may concern:

Beit known that I, JOHN GEononLnrNnR, a citizen of the United States ofAmerica, residing in the city and county of Denver and State ofColorado, have invented a new and. useful Quick -Acting Air-ControllingValve for Rock-Drillin Engines, of which the. following is aspeciiication.

My invention relates to improvements in quick acting air controllingvalve mechanism for rock drilling engines, and the objects of myinvention are: first, to provide a. simple positively sealing valve thatwill turn on or shut oil" the air instantly by a short part-circlerotary movement, and that will: not stick or freeze in its seat. Andsecond, to provide a valve controlled and air inletmechanism for rockdrilling engines, inwhich the air'entrancc to the cylinder and its valvemechanism is provided with a rotary swiveling hose connecting elbow, andwith a quick port opening and closing valve arranged to receive airdirectly from said elbow and in which the valve or elbow cannot stickorfreeze in their seats. I attain these objects by the mechanismillustrated in the accompanying drawings, in which:

Figure 1, is a plan view of a cylinder of a rock drilling engine.provided with my quick acting valve and-air inlet swiveling hoseconnection. Fig.- 2, is aside elevation of Fig. 1. Fig. 3, is an endelevation of Figs. 1 and 2. Fig. 4, is a section of Fig. 1,

v on line it-1. Fig. 5, is a horizontal sectional view on the line 5-5of Fig. 2. Fig. 6, is a vertical longitudinal-sectional view of thecylinder-0n the line 6-6 of Fig. 1, showing the same provided withcylinder heads and with a piston hammer. Fig. 7, is aside elevation ofthe valve, And Fig. 8, is an end elevation of the valve shown in Fig. 7.i

Similar letters of reference refer to similar parts throughout theseveral views.

Referring to the drawings, the numeral 1 designates the cylinderofarock-drilling englne, and I have preferably illustrated my improvedvalve applied to'the cylinder of a rock drilling engine asit wasespecially desrgned for use on-the type of rockdrilling engineillustrated in my pending -United Statesapplica-tion No. 570,339,1i1edJuly 5th,

1910, although it canbe used on other types of. air nsing rockdril'lingengines and on other .kinds of a r. or steamusmgfmachines that require ahand operating quick opening and closing valve.

In order to show the coiipcrative relation of my improved air inletvalve, it is necessary to describe the port and valve mechanism, andthecontrolling relation of the valve to them.

. The cylinder is provided with a front head 1 and with a.rear head 1",only tragments of which are shown. The top of the" cylinder is alsoprovided with a valve chest 2, which preferably is positioned centrallyon top ofand lengthwise of it. This valve chest contains a cylindricalbore 3, that extends entirely through it, the opposite ends of which areprovided with an interior thread in which plugs 4; are screwed, whichform removable heads for it. A round stemshaped valve 5 is reciprocallvmounted in the bore of the valve chest. The stem portion of the valve isprovided at its opposite ends with collar portions 6, and it is alsoprovided with collar portions 7 intermediate of its ends, which arepositioned preferably I at equal distances from their adjacent end"collar portions. The collar portions of the valve 5 fit closely butreciprocally in the bore 3 of the valve'ch'est. while the stem portionis made enough smaller in diameter than the collar portions to formspaces between the collars for the compressed air to flow into and fromthem intothe cylinder inlet and exhaust ports. The end collar portionsare provided with port apertures S and 9, that extend through them fromside to side. These apertures 8 and Q'communicate with the opposite endportions of the valve chest and with the exhaustports 10 and 11, thatare formed. in the inner peripheral circumferentia'l wall of-the valvechest. These port" apertures S and 9 are arranged to permit the livecompressed air that flows into the opositeendsof the cylinder and thatflows rom the opposite ends of the cylinder,

through the ports 12 and'-13 into the oppo site end portions of thevalve chest, to flow through them into the exhaust ports 10 and 11 afterthe live air in the opposite ends of the valve chest has started andmoved the An air inlet port. His formed in the valve chest midwaybetween the cylinder ports and 16, and the port 14: communicates with aconical valve seat 17, which extends transversely through the cylindercasing, between the valve chamber and the hammer piston cylinder, and inthis valve seat is seated a I hollow conical valve 18, having a port19,;

24, which I term "the inlet bushing,fandwhich isthreaded into the inletaperturef and is provided with a wrench receiving 20 outer end portionwhich enables it to be removably secured to the said threaded inletaperture. This bushing is provided with an inwardly flaring conicalaperture 26. One end of an elbow 27, which is provided with an enlargedtapering head portion 28, the outer end portion of which is the largerin diameter, is adapted to fit revolubly in the conical aperture 26 inthe bushing. The opposite end of the elbow is threaded to receive a hosecoupling member 29, which is adapted to be connected to a hose whichextends to a supplyof compressed air under pressure enough to operatethe drilling en-- glue.

The exhaust ports 10 and 11, which are formed in the valve chest betweenthe cylinder inlet ports and the opposite end collar portions of thevalve, convey the exhaust air from the cylinder and its inlet ports intoan exhaust chamber 30 formed in a lateral extension 31 on one side ofthe valve chest,

from which the exhaust air flows through a threaded xhaust outletaperture 32 in which is screwed an exhaust ell, not shown. The inlet andexhaust ports of the valve chest are all preferably circumferentialgrooves formed in the wall of the bore of the valve chest.

The cylinder is provided with a piston hammer bore 34:, in which a drillbit driving piston hammer35 is reciprocally mounted. The opposite endsof the cylinder are provided with cylinder rings 36 and 37, and with thecylinder heads 1 and 1 only fragments of which are shown. 4

The above description of the cylinder and its valve chest and valveports has been given in order to show the cooperative relation of myimproved quick acting swiveling air inlet hose connecting elbow and ofmy quick acting valve. The taper construction and the seatingarrangement of the valve and of its swiveling inlet portion and of theirseats preventst-hem from sticking or 65 binding or freezing in theirseats, and the swiveling elbow from any direction, and the elbow beturned to be connected thereto.

The handle of the valve is preferably ar- -throw the handle against thelug 40. Vi

desires to open the valve he has only ranged in such a relative positionto the air port of the valve that it stands in a horizontal positionagainst the lug 40 when the port 19 registers open to the air port 14:.Consequently to close the valve the handle is grasped and moved to avertical position, which 'moves the port 19 to stand at right angles tothe port 14, and when the operator a, to hen the port 19 of the valveregisters with the port 14;, the air enters the swiveling elbow andpasses into the hollow conical portion of the valve and up through itsport 19 into and through the port 14, into the valve chests bore andbetween the collars 7 of the valve, which it reciprocates automaticallyin the valve chest, which permits the air to fiow to the opposite endsof the cylinder through the'ports 15 and 16, and then to exhaust"through the same ports and also through the ports 10 and 11 into theexhaust chamber 30, from which it exhausts through the exhaust outlet 32to the atmosphere.

My invention provides a positively workin quick action valve thatenables the full 100 v0 ume of air to be turned on in a fraction of asecond or to be instantly shut off.

Having described my invention, what I claim as new and desire to secureby Letters Patent, is: r

a 10's 1. In a rock-drilling engine, amain cylinder; a valve-chambermounted thereon and having its axis-parallel to the axis of said maincylinder; a valve in said valvechamber; a fluid-inlet in saidvalve-chamher; a hollow, transversely-disposed throttlevalve having aport adapted to register with the fluid-inlet of said valve-chamber, andprovided with an operating handle at one side of the cylinder andvalve-chamber; and a main fluid-inlet on the opposite side of saidcylinder for supplying motive-fluid to the interior of said throttlevalve.

2. In a rock-drilling engine, a main cylinder; a valve-chambermountedthereon and 12 having its axis parallel to the axis of said maiiicylinder; a valve in said valve-chamber; said cylinder having fluidpassages leading from said valve-chan'ibcr to either end 01' said maincylinder; a fluid-inlet in said valve-chamber; a hollow throttle-valvetransversely-disposed in the wall of said cylinder, between said fluidpassages, having a port adapted to register with the fluldx-lnlet ofsaid valve-chamber, and provided with an operating handle at one side ofthecylinder and Valve-chamber; and. a main flu1d in1et on the opposite'side of said cylinder for supplying motive-fluid to the'interior ofsaid throttle-valve. I v r 3. In a rock-drilling engine, the-combinationof a casing eomprislng a cylinder, a valve-chamber parallel to thecylinder; said casing having a passage therethrough between thecylinder-sandvalve-chamber; a

fluid-in1et connected to said passage onone I Copies of this patent maybe obtained for five cents .each,

Washington, I). 0.

side; and a throttle-valve located in said passage; said casing havingalso conduits for conveying the motive-fluid to the valve andafrom thevalve-chamber to the 15 chamber, cylinder. I In testimony whereof Iaflix my signature in presence of two witnesses. JOHN GEORGE LEYNER.Wifinessest' Y G. SARGENT ELIJOTT,'

' ELIZABETH SMITH.

by addressing the bommissioner a: mum.

